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Title: Liquid Ultrasonic Meter: Three Years On ... Learning & Experience
Author: Abdullah Obaidani, Salim Al-Sibani
Source: 2007 South East Asia Flow Measurement Conference
Year Published: 2007
Abstract: The purpose of this paper is to present the background on the implementation and use of liquid Ultrasonic Meter for hydrocarbon allocation and reconciliation in Petroleum Development Oman. The option of using Liquid Ultrasonic meter was proposed as a solution based on successful implementation of this type of meter in Southern Field of Nimr in Oman, where numerous attempts at using PD and Orifice meter to measure the Central Production facilities output to the required accuracy was unsuccessful. The Liquid Ultrasonic meter used was the Krohne Ultrasonic V for viscosity of 200 cP which based on the line size and flow rate directly characterized the flow in the lamina range. The decision to adopt the liquid ultrasonic meter for the reconciliation application stemmed from the successful results from the Krohne meter. Fundamentally the line size of 24 inch and requirement for a maintenance free operation directed the decision for opting for the ultrasonic meter solution. The paper will discuss the use of liquid clamp on ultrasonic meter in hydrocarbon reconciliation, and issues encountered. In addition it will explore the use of online remote monitoring facility that was implemented on the meters. Also it will address the effect of the seasonal temperature changes. The drive to implement the proposed system was primarily to improve operational efficiency and availability and hydrocarbon reconciliation.

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